Fred De Cordova, who produced the series at the time and directed this episode, would become the executive producer of Carson's Tonight Show in 1970.
In this 1963 episode, Jack suggests that Johnny Carson learn a trade other than "just sitting behind a desk", asking how long that kind of job can last. For the record, Johnny went on to host "The Tonight Show" for 30 years (1962-1992), and when he died in 2005, he had a reported net worth of over $300 million.
Johnny Carson idolized Jack Benny, and took it very hard when Jack died in 1974, openly weeping at Jack's funeral.